XS RFR: 8006006: [parfait] Memory leak at hotspot/src/share/tools/launcher/wildcard.c

[Calvin Cheung]

A simple fix to add FileList_free(fl) before returning a NULL 
WildcardIterator.

webrev: http://cr.openjdk.java.net/~ccheung/8006006/webrev/
bug: https://jbs.oracle.com/bugs/browse/JDK-8006006

Testing: built fix with parfait compiler on linux, ran parfait and 
observed that the warning was gone.

thanks,
Calvin